600MPa 級(jí)低碳微合金高強(qiáng)鋼的開發(fā)研究Abstract This paper introduce development of 600MPa steel with low cost in Meishan. By using gleeble 3500 system,
the high temperature deforming properties、CCT Curve and Resistance of deformation of test steel is studied, a conclusion
is drawn that the test steel high temperature ductility area is 650～800℃and above 1300℃.High Nb make its CCT Cure
move strongly toward left,fine ferrite and bainite will appear on the condition cooling rate beyond 5℃/s,it seems that
high Nb has the same effect of Mo. The test steel has low alloy cost and relative low rolling force, the design of test steel
is suited to Meishan to produce high strength steel.
Key words high Nb, high strength, hot simulate, CCT, high temperature ductility
1 引言
進(jìn)入21世紀(jì)以來，我國(guó)經(jīng)濟(jì)高速增長(zhǎng)，加速了我國(guó)鋼鐵材料的升級(jí)換代。但因梅鋼1422熱軋產(chǎn)線屬
于國(guó)外二手設(shè)備，雖然經(jīng)過多次改造，產(chǎn)線精軋機(jī)架軋制力始終偏低,開發(fā)高強(qiáng)鋼受限。
高強(qiáng)、高韌鋼要求很高的精軋軋制力和高精軋累積壓下率要求，否則只有通過合金添加來開發(fā)，但合
金的添加會(huì)造成噸鋼成本增加。如果能找到一種精軋負(fù)荷不高、成本較低的產(chǎn)品設(shè)計(jì)，就可幫助梅鋼批量
生產(chǎn)高強(qiáng)鋼，提高梅鋼市場(chǎng)競(jìng)爭(zhēng)力。
本文研究的屈服強(qiáng)度600 MPa級(jí)高強(qiáng)鋼是以貝氏體加少量鐵素體為基體組織，利用Gleeble3500熱模...
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